BTA20.3-NA-WE-VB-BS Bosch Rexroth Indramat
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The Bosch Rexroth Indramat BTA20.3-NA-WE-VB-BS is part of the BTA20 Machine Control Boards series and features 8 digital inputs and 8 digital outputs, with each output providing 200 mA. It includes an INTERBUS-S / BT-BUS communication bus with a rate of 500 kbaud and offers front panel protection rated at IP65. The control board also provides 2 emergency stop circuits, 3 enabling circuits, one RS232 port, and two RS422 ports.
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Product Description:
The BTA20.3-NA-WE-VB-BS machine control board is produced by Bosch Rexroth Indramat for the BTA20 Machine Control Boards series. It serves as a distributed I/O and motion supervision module inside modular automation systems, linking sensor sets, actuator banks, and higher-level PLCs through its integrated fieldbus resources. It is intended for applications that need reliable exchange of machine status, command signals, and safety-related states between local devices and the central control layer.
Its field connection layer is built around the INTERBUS-S / BT-BUS interface, allowing deterministic data exchange between the board and remote stations. The serial backbone operates at 500 kbaud, so up to 500,000 symbols per second can be transferred on the shielded twisted-pair trunk. For every bus cycle, the controller moves an I/O block width of 3 words, giving a fixed 48-bit payload for process variables. Logic power for attached sensors is provided by a bus source rated at 50 mA, while each transistorized output line can switch loads drawing as much as 200 mA without external relays. One RS-232 maintenance port and two RS-422 diagnostic channels are present for local setup and diagnostics.
The discrete channel set contains 8 digital inputs that accept 24 V logic and latch states for the cyclic telegram, and 8 digital outputs that drive optically isolated sinks for valve coils or contactors. Machine protection is addressed by two independent safety paths; the board integrates 2 emergency stop circuits that interrupt power when a category-0 stop is demanded, and 3 enabling circuits that must be closed before motion commands are issued. An IP65-rated front panel shields the connectors against dust and low-pressure water jets, allowing the electronics to be mounted on the machine envelope. The INTERBUS identification code is 3, so master modules can recognize the device type automatically during a scan. Internal logic conditions the status bits, queues fault messages, and forwards them across the bus within the established timing limits.
Frequently Asked Questions about BTA20.3-NA-WE-VB-BS:
Q: How many digital inputs are available on the BTA20.3-NA-WE-VB-BS control board?
A: The BTA20.3-NA-WE-VB-BS machine control board provides 8 digital inputs for connected devices.
Q: How many emergency stop circuits are featured on the BTA20.3-NA-WE-VB-BS?
A: There are two emergency stop circuits included on this control board for safety integration.
Q: What is the maximum output current per output for the BTA20.3-NA-WE-VB-BS?
A: The maximum output current for each output on this control board is 200 mA.
Q: Which communication bus systems are supported by the BTA20.3-NA-WE-VB-BS?
A: This unit supports communication via INTERBUS-S and BT-BUS interfaces.
Q: What is the front panel protection rating of the BTA20.3-NA-WE-VB-BS?
A: The front panel of this control board is rated IP65 for protection against dust and water.
